Service / Critical Power Installation
Three Phase UPSInstallation and Commissioning Australia
Direct answer
A three phase UPS installation is a switchboard project as much as an equipment project: it requires dedicated input and output submains, a wrap-around maintenance bypass so the system can be serviced without dropping the load, external battery cabinets, and load bank commissioning to prove capacity before the real load is transferred onto it.
Indigi Power and Cooling installs and commissions three phase UPS systems from 10kVA to multi-megawatt across Australia, certified under AS/NZS 3000, from $3,200 ex GST.
What actually takes the time
The UPS isthe easy part
Nobody books a three phase UPS install because they are worried about lifting the cabinet into place. The complexity lives upstream and downstream of it: whether the switchboard has the capacity and the physical space, how the load gets transferred without an outage, and how you prove the system works before you trust it with a data hall.
A typical three phase job involves a new input submain sized for the UPS and its battery charging current, an output submain to a dedicated critical distribution board, a maintenance bypass arrangement, earthing and fault loop verification, and battery cabinets that frequently weigh more than the UPS itself. Where a generator is involved, the interface and the transfer sequence need designing rather than assuming.
The other constraint is that these sites usually cannot go dark. Most of our three phase work is retrofit into a live environment, which means a staged cutover, temporary supplies or bypass work, and windows scheduled at times nobody enjoys working. That is planned at site inspection, not improvised on the day.
Indigi Power and Cooling is Indigenous and Veteran-owned, Supply Nation and ICN Gateway registered, which matters for government, defence and enterprise procurement. Our installers are licensed electrical workers and every system is commissioned with a signed record.
Configuration
Standaloneor redundant
Standalone
- One UPS carrying the whole critical load
- Lowest capital and installation cost
- Maintenance bypass essential, not optional
- Servicing means running on raw mains via bypass
- Suits industrial plant, comms rooms, smaller halls
Parallel
redundant
- Two or more modules sharing the load
- One module can fail or be serviced with no loss of protection
- Parallel tie cabinet and matched cable lengths required
- Commissioning includes load sharing verification
- Standard for data halls, hospitals and Tier-rated facilities
Modular systems sit between the two. A single cabinet holds several hot-swappable power modules, so capacity can be added later and a failed module replaced without shutting the frame down. The Liebert EXM in the photograph above is this arrangement: individual power modules stacked in one frame, each removable while the system stays online.
The installation consequence is worth knowing before you specify. Modular frames are usually cheaper to expand and simpler to service, but the frame is sized at purchase, so the capacity ceiling is fixed on day one. Parallel systems cost more to install because of the tie cabinet and cable matching, but the ceiling is higher.
The part people skip
Maintenancebypass
If there is one thing worth insisting on at design stage, it is this. Without it, every future service visit means an outage.
A maintenance bypass, sometimes called a wrap-around bypass, is external switchgear that lets the load be fed directly from mains while the UPS is completely isolated. It is not the same as the internal static bypass, which keeps the UPS energised and cannot be used to work on the unit safely.
Sites without one face an unpleasant choice every time the UPS needs a battery change, a capacitor replacement or a firmware update: take an outage, or defer the work. Deferring the work is what people actually do, which is how UPS systems end up with five-year-old batteries and no one willing to test them.
Retrofitting a bypass later is possible but costs considerably more than installing one at the outset, because the switchboard work has to be done around a live load. If you are installing a three phase UPS now, put the bypass in now.
Proving it works
Load bank commissioning
A three phase UPS should never meet its real load for the first time in production. A load bank applies a controlled artificial load so the system can be taken to full capacity, held there, and failed deliberately, before anything valuable depends on it.
| Test | What it proves |
|---|---|
| Pre-energisation | |
| Insulation resistance and continuity | Cabling and terminations are sound before anything is energised |
| Phase rotation and earth fault loop impedance | Supply is correct and protective devices will operate within required times |
| Battery string voltage, polarity and torque | Strings are correctly assembled, and connections will not develop hot joints |
| Functional | |
| Static and maintenance bypass transfer | Load can be moved on and off the UPS without interruption, in both directions |
| Mains failure simulation | The system carries the load on battery when the supply is removed, cleanly |
| Load sharing, parallel systems only | Modules share load evenly and the system rides through a single module failure |
| Capacity | |
| Load bank test at design load | The system delivers rated output under sustained full load without alarming or derating |
| Battery autonomy discharge test | Actual runtime at design load, which is the only number worth quoting to a board |
| Thermographic scan under load | No developing hot joints in the switchboard or terminations at working current |
Where a facility requires witnessed testing for a consultant, head contractor or Tier certification, we schedule and document accordingly. The output is a signed commissioning record with the measured results, not a tick sheet.
Commercial
Three phase installation pricing
Australian rates, ex GST, covering electrical installation and commissioning. Equipment, switchboard fabrication and load bank hire are quoted per project.
Switchboard connection, battery cabinets, maintenance bypass and full commissioning. Typical for comms rooms and smaller plant.
Switchboard works, parallel or redundant configuration, load bank commissioning and battery autonomy testing. The typical data hall or hospital install.
Design review, staged cutover planning, witnessed testing and commissioning documentation to consultant or Tier requirements.
The biggest cost variables are switchboard capacity, the length and route of the new submains, whether the existing load can be interrupted at all, and access for battery cabinets. We quote fixed price after inspection.
How it runs
From design review to handover
Site inspection and design review
Measured load and growth allowance, switchboard capacity and spare ways, submain routes, battery cabinet access and floor loading, room heat rejection, and any generator interface. Where a consultant has specified the system, we review the design against site reality before pricing.
Cutover method statement
How the load moves onto the new system without an outage, what temporary supplies or bypass arrangements are needed, which windows require out of hours work, and what the rollback is if something does not go to plan.
Switchboard and submain works
Input and output submains sized for load plus battery charging, protective device coordination, maintenance bypass installation, earthing and bonding, labelling and schedules updated.
Equipment installation
UPS frame and battery cabinets positioned with service clearances, parallel tie cabinet and matched cabling on redundant systems, battery strings assembled and torqued to specification.
Commissioning and load bank testing
The full test sequence above, including transfer testing in both directions, load bank testing at design load, battery autonomy discharge and thermographic scan under load. Witnessed where required.
Staged cutover and handover
Load transferred in planned stages, compliance certificate and signed commissioning record issued, as-installed drawings and schedules updated, operator training delivered and a maintenance schedule handed over.
Where they go
Facilities we install into
Coverage
Installersacross Australia
Brisbane and QLD
Brisbane CBD, Tingalpa, Woolloongabba, Eight Mile Plains, Port of Brisbane, Gold Coast, Ipswich, Townsville, Cairns
Our HQ. Government, health and industrial three phase work across Southeast Queensland and the regions.
Sydney and NSW
Sydney CBD, Parramatta, North Ryde, Macquarie Park, Western Sydney, Alexandria, Newcastle, Wollongong
The largest concentration of data halls in Australia. We work to site induction, permit and change-control requirements.
Melbourne and VIC
Melbourne CBD, Port Melbourne, Docklands, Dandenong, Tullamarine, Geelong, Ballarat, regional Victoria
The Port Melbourne to Tullamarine corridor, plus hospital and manufacturing plant rooms.
Perth and WA
Perth CBD, Fremantle, Kewdale, Kalgoorlie, Pilbara, regional WA
Resources and government projects, including ruggedised installations on remote sites.
Canberra and ACT
Canberra CBD, Civic, Fyshwick, Mitchell, Barton, Tuggeranong, Belconnen, Queanbeyan
Government data halls, with Supply Nation and ICN Gateway registration for Commonwealth procurement.
SA, NT and Tasmania
Adelaide, Port Adelaide, Edinburgh, Whyalla, Darwin, Palmerston, Katherine, Alice Springs, Hobart
Defence and resources projects, planned around mobilisation windows and site access.
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Questions
Three phaseinstall FAQs
What consultants and facilities teams ask before a three phase install. If yours is not here, call 1800 046 344.
What is a three phase UPS?
A three phase UPS takes a three phase supply, typically 400V between phases in Australia, and is used where the critical load is too large for a single phase system or where the building supply is already three phase. Capacities start around 10kVA and run into multiple megawatts. Some units accept three phase input and deliver single phase output, which is a common arrangement in the 10 to 40kVA band.
How much does three phase UPS installation cost in Australia?
Indigi Power and Cooling installs three phase UPS systems from $3,200 ex GST for smaller systems up to about 40kVA, and from $6,500 ex GST for medium capacity to around 200kVA. Larger and multi-module systems are quoted after a site inspection. Those figures cover the electrical installation and commissioning; equipment, switchboard fabrication and load bank hire are quoted per project. The main cost variables are switchboard capacity, submain length and whether the existing load can be interrupted.
Do I need a maintenance bypass?
For any three phase UPS, effectively yes. A maintenance bypass is external switchgear that feeds the load directly from mains while the UPS is fully isolated, so the system can be serviced without an outage. It is not the same as the internal static bypass, which keeps the UPS energised and cannot be used to work on the unit safely. Retrofitting one later costs substantially more, because the switchboard work has to be done around a live load.
What is UPS load bank testing?
Load bank testing applies a controlled artificial load to the UPS so the system can be run at full rated capacity without connecting the real load. It proves the system delivers rated output under sustained load without alarming or derating, and it allows a battery autonomy discharge test that measures actual runtime at design load. It is the difference between believing a UPS will carry the facility and knowing it will.
How long does a three phase UPS installation take?
Three to five days on site is typical, extending where switchboard modification, a new submain or a staged cutover is required. The equipment placement is rarely the constraint. Switchboard works, cable routes and the number of interruption windows the site can tolerate are what set the programme, which is why the cutover method is agreed at inspection rather than on the day.
What is the difference between N+1 and a modular UPS?
N+1 parallel redundancy means two or more complete UPS modules share the load through a tie cabinet, so any one can fail or be serviced with no loss of protection. A modular UPS holds several hot-swappable power modules inside one frame, giving similar resilience with simpler installation, but the frame fixes the capacity ceiling at purchase. Parallel systems cost more to install because of the tie cabinet and matched cabling, and are used where the ceiling needs to be higher.
Can a three phase UPS be installed without downtime?
In most cases, with planning. Where a maintenance bypass exists the load can be transferred onto it and the work done live. On retrofits without one, we install temporary supplies or a temporary bypass and stage the cutover, scheduling the brief transfer windows out of hours. The method statement, including a rollback plan, is agreed before work starts.
Related services
Equipment
Three phasebrands we install
We install and commission the platforms we also service, so the technician commissioning your system is the one who will maintain it. Equipment specified by a consultant or bought elsewhere is no problem: we will quote the installation on its own.
Replacing an end-of-life three phase system? We handle staged cutover, temporary supplies and disposal of the old unit and its battery strings. Send us the existing make, model and single line diagram and we will quote the replacement including the method statement.
Partner with Us
Reliable Power & Cooling Solutions from Indigi Power & Cooling Expert supply, installation, and contracting services for critical infrastructure across Australia.